Heater.



J. s. WALKER- 8n s. WILGOX.

1909 2 $HEETS-SHEET 2.

Patented Apr. 20,

THE NORRIS PETERS cm, wAsHmaraN, n c

UNITED STATES PATENT ornion.

JOHN S. WALKER AND SYLVESTER N. WILCOX, OF PITTSBURG, PENNSYLVANIA.

HEATER.

. Specification of Letters Patent.

Patented April 20, 1909.

Application filed January23, 1908; Serial No..4l2,282.

To all whom it may concern:

Be it known that we, JOHN S. WALKER and SYLVESTER N. WILoox, citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented certain new and useful Improvements in Heaters, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to heaters, and relates more particularly to thatclass of heaters wherein gas is used as a heating medium for heating air within the heater, prior to the discharge of the air from the heater and its distribution to the compartments of a building.

The primary object of our invention is to provide a novel heater having a large area of heating surface to which the cold air admitted to the heater is subjected, in order 7 that the air will be thoroughly heated before being discharged from the heater.

A still further object of our invention is to provide a heater wherein a circuitous or sinuous path is provided for the products of combustion whereby a high degree of efficiency can be obtained from a minimum expenditure of fuel. 7

With the above and other objects in view which will ap ear as the invention is more fully describe the same consists of the novel construction, combination and arrangement of parts to be hereinafter more particularly described and then specifically claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming'a part of this application, and wherein like numerals of reference will be employed to indicate like parts throughout the different views of the drawings, in which:

Figure 1 is a central vertical sectional view of a heater constructed in accordance with our invention. Fig. 2 is a horizontal sectional view taken on the line 2-2 of Fi 1. Fig. 3 is a similar view taken on the inc XX of Fig. 1, and, Fig.4 is also a horizontal sectional view taken on the line YY of Fig. 1.

To put our invention into practice we provide an outer shell or casing 1 which, in practice, is usually supported u on legs 2, and is generally provided with a 'rusto-conical top 3 having a plurality of exit flues 4.

Secured to the inner face of the outer shell or casing 1, some distancelabove the lower each of these brackets is secured to the outer casing or shell 1, and to the other leg of each bracket is'secured the inner casing or shell 5, the brackets serving not only as a support for the inner shell, but as a means for spacing the inner shell away from the outer shell or casing 1. The said inner shell 5 is provided with depending legs 6 which rest upon and are secured as by riveting to a casing 6 which practically constitutes the combustion chamber 6*, the said casing 6 extending to the top of the inner casing 5, and having a closed upper end as clearly seen in Fig. 1. The legs 6 being attached to the casing 6 near the lower end of the latter help to support this casing, and also act as a support for a doublewall drum to be hereinafter further described.

The casing 6 forming the wall of the combustion chamber 6 is provided with a doordrum 13, the outer wall of said drum snugly fitting the casing 5, and the upper end of the drumbeing closed by an annular plate 14, riveted around its outer edge to the flanged upper end of the outer wall of the drum as at 15, said flanged upper end of the outer wall of the drum resting upon the upper end of the casing 5. The inner wall of the drum 13 is also flanged at its upper end as shown at 20, the said flange extending in the opposite direction to the flange on the upper end of the outer wall of said drum. The inner edge of the annular plate 14 comes flush with the inner edge of said flange 20 soas to leave an annular opening 20 through spider 1 1 riveted at 14 to the closed upper end of the casing 6 and the arms of which are held by the rivets 15. y

In the space between the outer and inner walls of the drum 13 is arranged a spiral partition 16 providing a circuitous or sinuous passage-way 17 winding from the bottom of the space between the inner and outer walls of the drum to the top thereof. The said space between the inner and outer walls of the drum 13, communicates at the bottom of the drum, as by a pipe 18, with the combustion chamber within the casing 6, and in front of the inner end of the pipe 18, is provided the shell 6 with a vertical flue 19 extending in close proximity to the closed upperend of said shell 6 The products of combustion after being carried through the circuitous path between the inner and outer walls of the drum, are led off through an exhaust flue 20, adapted for connection with a stack or chimney (not shown).

In operation, the gas is ignited at the tion arranged between the walls of the drum,

the products of combustion are caused to pass upwardly between these walls in a circuitous manner, and are thereby retained in the chamber a sufficient length of time to cause the walls of the drum, and also the inner casing 5 to become thoroughly heated, before the products of combustion are finally discharged from the top of the drum chamber through the exhaust flue 20. The air to be heated in the heater, and after being heated distributed to the various compartmentspf a building, passes into the bottom of the outer casing or shell 1 and upwardly between the inner shell 6* and the inner wall of the drum 13, and esca es through the annular opening 14 into tie chamber at the upper end of the shell or casing 1 from whence it passes to the building through the exit flues 1. Cold air also passes upwardly between the outer casing or shell 1 and the inner easing 5, and during its upward passage is thoroughly heated by the heat given oil by the casing 5. During the passage ol cold air upwardly between the outer casing or shell 1 and the casing 5 and. also between the inner wall of the drum and the casing 6, the air is thoroughly heated. by the heat given oil by the walls of the drum and easing 5, before being discharged into the chamber at the top of the casing 1 and from thence delivered to the building.

Having fully described our invention what we claim is:

A heater comprising an outer shell or casing, an inner casing mounted. in said outer shell or casing and spaced therefrom, brael ets secured to said outer shell or casing and supporting said inner shell or casing, a double wall drum mounted in said. inner casing with its outer wall fitting the inner casing and having a flange at the upper end of said outer wall overlying the top of said inner casing, legs carried by said. inner casing l'or supporting said drum, a spiral partitionv arranged in the space between the walls of said drum, a combustion chamber easing having the upper portion thereof surrounded by said drum and provided. with a closed upper end, a vertical flue within said. combustion chamber casing, a pipe establishing communication between said. tlue and the space between the walls of the drum at the lower end of the latter, an exhaust pipe communicating with the space between the walls of the drum at the upper end of the latter, an annular plate secured to the llanged upper end of the outer wall of said drum, and a spider secured to the closed upper end of the combustion chamber casing and having its arms secured to said annular plate and the flanged upper end of the outer wall of said drum.

In testimony whereof we allix our signatures in the presence of two witnesses.

JOHN S. WALKER. SYLVES'IER N. WllXIOX.

Witnesses MAX H. Snoiiovrrz, K. H. BUTLER. 

